New upstream AST updates

[mhanberg]

Problem

There have been changes to the AST recently

• Add metadata about single-expression block closing/opening elixir-lang/elixir#13940
• Fix delimiter metadata for single quote atoms and remote calls elixir-lang/elixir#13966
• Add parens meta to stab operator and empty block elixir-lang/elixir#13973
• Add AST metadata about assoc operator location elixir-lang/elixir#13978
• Add separate metadata entry for every block parens elixir-lang/elixir#13996

Solution

Implement them!

Notes

There is a chance some of them clobber another one, like they added something about parens to the metadata but changed it later, so would need to check that